SMD code A57
Marking codes are not standardised, and the same code is reused by unrelated makers for unrelated parts. Below is every part in our tables printed with it, and any printed with a code that is easy to misread as it, from the manufacturers' own marking tables and published code lists.
14 parts are printed A57
Not sure which one you have?
Answer up to 4 quick questions and these 14 parts are ranked, with a meter test that settles it. It works on a dead part too.
FM507SMCRectifier, 2 pins, Formosa MicrosemiRectifierSMC2 pinsFormosa Microsemi
- What it is
- Rectifier
- Maker
- Formosa Microsemi
- Package
- SMC
- Pins
- 2
- Details
- Rectifier diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
FM507-Q1SMCRectifier, 2 pins, Formosa MicrosemiRectifierSMC2 pinsFormosa Microsemi
- What it is
- Rectifier
- Maker
- Formosa Microsemi
- Package
- SMC
- Pins
- 2
- Details
- Rectifier diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
FSA4157P6SOT-363Analog switch, 6 pins, onsemiAnalog switchSOT-3636 pinsonsemi
- What it is
- Analog switch
- Maker
- onsemi
- Package
- SOT-363
- Pins
- 6
- Details
- Low-Voltage, 1 SPDT Analog Switch
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
CAZ23C33SOT-23Zener diode, 3 pins, Silicon-Based TechnologyZener diodeSOT-233 pinsSilicon-Based Technology
- What it is
- Zener diode
- Maker
- Silicon-Based Technology
- Package
- SOT-23
- Pins
- 3
- Details
- Zener diode: Dual, 31..35V, Zzt=80, Izt=5.0mA, 300mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
CAZ59C33SOT-23Zener diode, 3 pins, Silicon-Based TechnologyZener diodeSOT-233 pinsSilicon-Based Technology
- What it is
- Zener diode
- Maker
- Silicon-Based Technology
- Package
- SOT-23
- Pins
- 3
- Details
- Zener diode: Dual, 31..35V, Zzt=80, Izt=5.0mA, 400mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
HD74ALVC2G157USSSOPRenesasNot recordedSSOPNot recordedRenesas
- What it is
- Not recorded
- Maker
- Renesas
- Package
- SSOP
- Pins
- Not recorded
- Details
- CMOS logic IC: 2-input multiplexer
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
OPA657NSOT-23-5Operational amplifier, 5 pins, Texas InstrumentsOperational amplifierSOT-23-55 pinsTexas Instruments
- What it is
- Operational amplifier
- Maker
- Texas Instruments
- Package
- SOT-23-5
- Pins
- 5
- Details
- Operational amplifier IC: Lo-noise, JFET, ±6.5V, 160V/V, 1.6GHz
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6114A638MRSOT-23-5Voltage supervisor, 5 pins, TorexVoltage supervisorSOT-23-55 pinsTorex
- What it is
- Voltage supervisor
- Maker
- Torex
- Package
- SOT-23-5
- Pins
- 5
- Details
- CMOS-IC: VDet 3.8V, ±Reset PPO, Wt=1.6s, Rt=3.13ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6365A572MRSOT-23-5DC-DC converter, 5 pins, TorexDC-DC converterSOT-23-55 pinsTorex
- What it is
- DC-DC converter
- Maker
- Torex
- Package
- SOT-23-5
- Pins
- 5
- Details
- DC/DC voltage converter IC: PWM st-dwn, 180kHz, 5.7V±2.5%, 1A, +CE
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6367A572MRSOT-23-5DC-DC converter, 5 pins, TorexDC-DC converterSOT-23-55 pinsTorex
- What it is
- DC-DC converter
- Maker
- Torex
- Package
- SOT-23-5
- Pins
- 5
- Details
- DC/DC voltage converter IC: PWM st-up, 5.7V±2.5%, 200mA, 180kHz, +CE
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6371A571PSOT-89DC-DC converter, 3 pins, TorexDC-DC converterSOT-893 pinsTorex
- What it is
- DC-DC converter
- Maker
- Torex
- Package
- SOT-89
- Pins
- 3
- Details
- DC/DC voltage converter IC: PWM st-up, 100kHz, 5.7V±2.5%, 100mA
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6371C571PSOT-89-5DC-DC converter, 5 pins, TorexDC-DC converterSOT-89-55 pinsTorex
- What it is
- DC-DC converter
- Maker
- Torex
- Package
- SOT-89-5
- Pins
- 5
- Details
- DC/DC voltage converter IC: PWM st-up, 100kHz, 5.7V±2.5%, 100mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC9301A572MRSOT-23-5DC-DC converter, 5 pins, TorexDC-DC converterSOT-23-55 pinsTorex
- What it is
- DC-DC converter
- Maker
- Torex
- Package
- SOT-23-5
- Pins
- 5
- Details
- DC/DC voltage converter IC: PWM st-up/dwn, 180kHz, 5.7V±2.5%, 250mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
1 more part has no package on record
XCL232D171KR-GDC-DC converter, TorexDC-DC converterNot recordedNot recordedTorex
- What it is
- DC-DC converter
- Maker
- Torex
- Package
- Not recorded
- Pins
- Not recorded
- Details
- DC/DC voltage converter IC: PFM st-dwn, 1.7V±2%, 150mA, +CE, CL
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
Is it dead? One meter test per kind
Parts of the same kind are tested the same way, so each test is here once. Each part above points to its own.
Silicon diode
Diode range, part lifted or one leg off the pad. Red probe on the anode.
Working, it reads
About 0.5 to 0.8 V anode to cathode, and open the other way. Small switching diodes read about 0.6 to 0.7 V; large rectifiers can read a little lower.
Dead, it reads
- The same reading both ways round, near 0 V with a continuous beep or the same middling value: shorted.
- Open both ways: failed open.
- A reading the wrong way round as well: leaky.
- On the board
- this is a first look only: the meter reads every path between those pins, and a short can be a neighbour. Lift one leg before you condemn it.
- Compare:
- If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
- Watch for:
- A three-pin body can hold two diodes. With a common pin they read two junctions from that pin, just like a transistor; in series they read two drops end to end. Test each pair the datasheet names.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Integrated circuit
Voltage with the board powered; ohms from each pin to ground with it off.
Working, it reads
Supply pin at its voltage and the output doing what the datasheet says. Readings between pins depend on the part.
Dead, it reads
- A pin near 0 Ω to ground or to the supply pin where an identical part does not read that: failed short.
- Supply present, output stuck: failed, or its load has.
- On the board:
- A pin shorted to ground on the board can be anything on that net. Lift the pin to be sure.
- Compare:
- The surest reference is the same IC on a working board, measured pin by pin.
- Watch for:
- Its protection diodes can read like junctions between pins, even like a transistor. That proves nothing either way.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Zener diode
Diode range for the forward check, part lifted, red probe on the anode. A bench supply for the Zener voltage.
Working, it reads
About 0.6 to 0.8 V forward and open in reverse on the diode range. Its Zener voltage shows only on a supply: feed it through a resistor that sets about 5 mA, cathode to positive, read quickly, and it should hold near its rated voltage.
Dead, it reads
- The same reading both ways round, near 0 V with a continuous beep or the same middling value: shorted.
- Open both ways, forward too: failed open.
- Holds well off its rated voltage on the supply test: drifted.
- A soft knee, or a voltage that creeps on the supply test: leaky.
- On the board
- this is a first look only: the meter reads every path between those pins, and a short can be a neighbour. Lift one leg before you condemn it.
- Compare:
- If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
- Watch for:
- A meter's diode range stops at about 2 to 3 V, so almost every Zener reads open in reverse on it, good or bad; a 3 V meter may just show a 2.4 or 2.7 V part. Above about 3 V the meter cannot tell a Zener from a plain diode.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Printed with a code easy to misread as A57
One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.
Codes that begin with A57
For a marking with its end worn or burnt off. Each code has a page of its own.
Codes not listed here are printed on 7 more parts.
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